Osomatsu-kun: Back to the Me no Deppa no Maki

Osomatsu-kun's second video game adaptation begins with Iyami finding an oddity in a scroll depicting his Edo-period paternal ancestor: the ancestor was not depicted with Iyami's signature buckteeth - which Iyami was told is a hereditary trait on his father's side - and instead holding up a seemingly anachronistic set of dentures. Osomatsu brings the scroll to Dekapan who had just banged up a time machine (literally, with a hammer) and begins the time travel between 1980s Japan, Edo-period Japan and prehistoric period to solve the case of the anachronistic dentures and missing buckteeth.

Back to the Me no Deppa no Maki plays like a typical Japanese-style adventure game with some bird's eye view roaming areas and light RPG elements. The actions in the first-person adventure view are all represented by visual buttons rather than words. The examine button (represented as a magnifying glass) turns on a cursor, which gives this game some point & select gameplay. The RPG elements are represented by a health bar, by a money resource (which changes currency based on the time period) and by the inn's health recovery function. The game also provides a "Game Center" in all eras as another money making source. In the Game Center, you gamble in a memory minigame.